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gh-142332: Fix usage formatting for positional arguments in mutually exclusive groups in argparse (GH-142333)

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Serhiy Storchaka 2025-12-06 20:03:45 +02:00 • committed by GitHub
parent 5be3405e4e
commit 70c27ce94b
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3 changed files with 26 additions and 7 deletions
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23
Lib/test/test_argparse.py
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@ -7361,7 +7361,28 @@ def test_argparse_color(self):
),
)
def test_argparse_color_usage(self):
def test_argparse_color_mutually_exclusive_group_usage(self):
parser = argparse.ArgumentParser(color=True, prog="PROG")
group = parser.add_mutually_exclusive_group()
group.add_argument('--foo', action='store_true', help='FOO')
group.add_argument('--spam', help='SPAM')
group.add_argument('badger', nargs='*', help='BADGER')
prog = self.theme.prog
heading = self.theme.heading
long = self.theme.summary_long_option
short = self.theme.summary_short_option
label = self.theme.summary_label
pos = self.theme.summary_action
reset = self.theme.reset
self.assertEqual(parser.format_usage(),
f"{heading}usage: {reset}{prog}PROG{reset} [{short}-h{reset}] "
f"[{long}--foo{reset} | "
f"{long}--spam {label}SPAM{reset} | "
f"{pos}badger ...{reset}]\n")
def test_argparse_color_custom_usage(self):
# Arrange
parser = argparse.ArgumentParser(
add_help=False,